Hmm, perhaps we were talking past each other.
You asked about the drawn schematic, this is the schematic of the Fasttech boost driver.
L- represents LED- of this driver, which is where the black cable to the LED is connected (the drain pin of the FET). So yes, on this driver it represents the electrical connection of driver LED- and mcpcb LED-.
L- (on this driver) is not the direct output of the boost circuit. That is pin3 of the PAM2803, which would be LED- on a driver without FET, like the Nanjg110.
On the FT driver the FET is sitting between pin3 of the PAM2803 and the LED.
Glad to have you on board. :laughing:
[EDIT:]
I opened a 15mm/17mm boost driver thread and will continue to fill it. There are still some parts missing, but it’s a start.